Mine runs 1C over ambient full load or idle. It's cooled with proper case ventilation, a Socket 7 HSF on the Northbridge, small HSFs on the voltage regulators and a passive HS on the clock generator.
Here is a pic. The clock gen HS was added after this pic was taken and added 1 MHz to my FSB.
[img="[URL]http://albums.photopoint.com/j/View?u=1551335&a=11768501&p=48642929[/URL]"]